Power supply unit



FIG. 1.1 is a front view of a power supply unit;

FIG. 1.2 is a rear view thereof;

FIG. 1.3 is a left view thereof;

FIG. 1.4 is a right view thereof;

FIG. 1.5 is a top view thereof;

FIG. 1.6 is a bottom view thereof;

FIG. 1.7 is a first perspective view thereof;

FIG. 1.8 is a second perspective view thereof;

FIG. 1.9 is a third perspective view thereof; and

FIG. 1.10 is a fourth perspective view thereof.

The broken lines depict portions of the power supply unit which form no part of the claimed design. 

CLAIM The ornamental design for a power supply unit, as shown and described. 